DE102007049110B4 - Internal combustion engine with two mixed camshafts - Google Patents
Internal combustion engine with two mixed camshafts Download PDFInfo
- Publication number
- DE102007049110B4 DE102007049110B4 DE102007049110.9A DE102007049110A DE102007049110B4 DE 102007049110 B4 DE102007049110 B4 DE 102007049110B4 DE 102007049110 A DE102007049110 A DE 102007049110A DE 102007049110 B4 DE102007049110 B4 DE 102007049110B4
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- Prior art keywords
- camshaft
- valve
- rocker
- working cylinder
- valves
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/26—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of two or more valves operated simultaneously by same transmitting-gear; peculiar to machines or engines with more than two lift-valves per cylinder
- F01L1/267—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of two or more valves operated simultaneously by same transmitting-gear; peculiar to machines or engines with more than two lift-valves per cylinder with means for varying the timing or the lift of the valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/12—Transmitting gear between valve drive and valve
- F01L1/18—Rocking arms or levers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
- F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
- F01L13/0036—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction
- F01L13/0047—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction the movement of the valves resulting from the sum of the simultaneous actions of at least two cams, the cams being independently variable in phase in respect of each other
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D13/00—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
- F02D13/02—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
- F02D13/0203—Variable control of intake and exhaust valves
- F02D13/0207—Variable control of intake and exhaust valves changing valve lift or valve lift and timing
- F02D13/0211—Variable control of intake and exhaust valves changing valve lift or valve lift and timing the change of valve timing is caused by the change in valve lift, i.e. both valve lift and timing are functionally related
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D13/00—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
- F02D13/02—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
- F02D13/0257—Independent control of two or more intake or exhaust valves respectively, i.e. one of two intake valves remains closed or is opened partially while the other is fully opened
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/12—Transmitting gear between valve drive and valve
- F01L1/18—Rocking arms or levers
- F01L1/181—Centre pivot rocking arms
- F01L1/182—Centre pivot rocking arms the rocking arm being pivoted about an individual fulcrum, i.e. not about a common shaft
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/02—Valve drive
- F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
- F01L1/047—Camshafts
- F01L1/053—Camshafts overhead type
- F01L2001/0537—Double overhead camshafts [DOHC]
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L2305/00—Valve arrangements comprising rollers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L2800/00—Methods of operation using a variable valve timing mechanism
- F01L2800/10—Providing exhaust gas recirculation [EGR]
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B3/00—Engines characterised by air compression and subsequent fuel addition
- F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/01—Internal exhaust gas recirculation, i.e. wherein the residual exhaust gases are trapped in the cylinder or pushed back from the intake or the exhaust manifold into the combustion chamber without the use of additional passages
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Abstract
Brennkraftmaschine mit wenigstens einem Arbeitszylinder, wobei jedem Arbeitszylinder wenigstens ein erstes Einlassventil (10) und wenigstens ein zweites Einlassventil (12) sowie wenigstens ein erstes Auslassventil (10) und wenigstens ein zweites Auslassventil (12) zugeordnet sind, wobei eine erste Nockenwelle (32) vorgesehen ist, welche die ersten Einlassventile (10) und die ersten Auslassventile (10) eines jeden Arbeitszylinders betätigt, wobei eine zweite Nockenwelle (36) vorgesehen ist, welche die zweiten Einlassventile (12) und die zweiten Auslassventile (12) eines jeden Arbeitszylinders betätigt, wobei an der zweiten Nockenwelle (36) ein Versteller angeordnet ist, welcher Ventilsteuerzeiten der dieser zweiten Nockenwelle (36) zugeordneten Ein- und Auslassventile (12) gegenüber den Ventilsteuerzeiten der ersten Nockenwelle (32) wahlweise nach früh oder spät verstellt, dadurch gekennzeichnet, dass wenigstens eine Kipphebelbrücke (14) derart angeordnet und ausgebildet ist, dass das erste und zweite Einlassventil (10, 12) wenigstens eines Arbeitszylinders gemeinsam und/oder das erste und zweite Auslassventil (10, 12) wenigstens eines Arbeitszylinders gemeinsam jeweils über eine Kipphebelbrücke (14) betätigbar sind, wobei an der Kipphebelbrücke (14) um eine Schwenkachse (22) schwenkbar eine Wippe (24) derart angeordnet ist, dass die erste Nockenwelle (32) mit einem jeweiligen Nocken (30) an einer ersten Stelle (25) beabstandet von der Schwenkachse (22) auf die Wippe (24) einwirkt und die zweite Nockenwelle (36) über einen jeweiligen Nocken (34) an einer zweiten Stelle (27) beabstandet von der Schwenkachse (22) auf die Wippe (24) einwirkt, wobei die erste und die zweite Stelle (25, 27) an gegenüberliegenden Seiten der Wippe (24) bezogen auf die Schwenkachse (22) angeordnet sind.Internal combustion engine with at least one working cylinder, each working cylinder having at least one first inlet valve (10) and at least one second inlet valve (12) and at least one first outlet valve (10) and at least one second outlet valve (12) associated with a first camshaft (32). is provided, which actuates the first intake valves (10) and the first exhaust valves (10) of each working cylinder, wherein a second camshaft (36) is provided, which actuates the second intake valves (12) and the second exhaust valves (12) of each working cylinder in which an adjuster is arranged on the second camshaft (36), which selectively adjusts valve timing of the intake and exhaust valves (12) associated with this second camshaft (36) with respect to the valve timings of the first camshaft (32), either early or late, characterized in that at least one rocker arm bridge (14) is arranged and designed such that the first and second inlet valves (10, 12) of at least one working cylinder are jointly actuable and / or the first and second outlet valves (10, 12) of at least one working cylinder can be actuated jointly via a rocker arm bridge (14) Pivot axis (22) pivotally a rocker (24) is arranged such that the first camshaft (32) with a respective cam (30) at a first location (25) spaced from the pivot axis (22) acts on the rocker (24) and the second camshaft (36) acts on the rocker (24) via a respective cam (34) at a second location (27) spaced from the pivot axis (22), the first and second locations (25, 27) on opposite sides the rocker (24) with respect to the pivot axis (22) are arranged.
Description
Die Erfindung betrifft eine Brennkraftmaschine, insbesondere Dieselmotor, insbesondere eines Kraftfahrzeugs, mit wenigstens einem Arbeitszylinder, wobei jedem Arbeitszylinder wenigstens ein erstes Einlassventil und wenigstens ein zweites Einlassventil sowie wenigstens ein erstes Auslassventil und wenigstens ein zweites Auslassventil zugeordnet sind, wobei eine erste Nockenwelle vorgesehen ist, welche die ersten Einlassventile und die ersten Auslassventile eines jeden Arbeitszylinders betätigt, wobei eine zweite Nockenwelle vorgesehen ist, welche die zweiten Einlassventile und die zweiten Auslassventile eines jeden Arbeitszylinders betätigt, wobei an der zweiten Nockenwelle ein Versteller angeordnet ist, welcher Ventilsteuerzeiten der dieser zweiten Nockenwelle zugeordneten Ein- und Auslassventile gegenüber den Ventilsteuerzeiten der ersten Nockenwelle wahlweise nach früh oder spät verstellt, gemäß dem Oberbegriff des Patentanspruchs 1. The invention relates to an internal combustion engine, in particular a diesel engine, in particular a motor vehicle, with at least one working cylinder, each working cylinder being assigned at least one first inlet valve and at least one second inlet valve and at least one first outlet valve and at least one second outlet valve, wherein a first camshaft is provided, which actuates the first intake valves and the first exhaust valves of each working cylinder, wherein a second camshaft is provided, which actuates the second intake valves and the second exhaust valves of each working cylinder, wherein on the second camshaft, a phaser is arranged, which valve timing associated with said second camshaft Inlet and exhaust valves with respect to the valve timing of the first camshaft selectively adjusted to early or late, according to the preamble of claim 1.
Aus
Aus der
Die
Aus der
Die
Auch die
Der Erfindung liegt die Aufgabe zugrunde, eine Brennkraftmaschine der o.g. Art hinsichtlich Einlass- sowie Auslassdauer der Gaswechselventile und damit der Zylinderfüllung zu verbessern. The invention is based on the object, an internal combustion engine og. To improve the type of intake and exhaust duration of the gas exchange valves and thus the cylinder filling.
Diese Aufgabe wird erfindungsgemäß durch eine Brennkraftmaschine der o.g. Art mit den in Anspruch 1 gekennzeichneten Merkmalen gelöst. Vorteilhafte Ausgestaltungen der Erfindung sind in den weiteren Ansprüchen beschrieben. This object is achieved by an internal combustion engine o.g. Art solved with the features characterized in claim 1. Advantageous embodiments of the invention are described in the further claims.
Dazu ist es bei einer Brennkraftmaschine der o.g. Art erfindungsgemäß vorgesehen, dass wenigstens eine Kipphebelbrücke derart angeordnet und ausgebildet ist, dass das erste und zweite Einlassventil wenigstens eines Arbeitszylinders gemeinsam und/oder das erste und zweite Auslassventil wenigstens eines Arbeitszylinders gemeinsam jeweils über eine Kipphebelbrücke betätigbar sind, wobei an der Kipphebelbrücke um eine Schwenkachse schwenkbar eine Wippe derart angeordnet ist, dass die erste Nockenwelle mit einem jeweiligen Nocken an einer ersten Stelle beabstandet von der Schwenkachse auf die Wippe einwirkt und die zweite Nockenwelle über einen jeweiligen Nocken an einer zweiten Stelle beabstandet von der Schwenkachse auf die Wippe einwirkt, wobei die erste und die zweite Stelle an gegenüberliegenden Seiten der Wippe bezogen auf die Schwenkachse angeordnet sind. For this it is in an internal combustion engine o.g. Art according to the invention provided that at least one rocker arm bridge is arranged and designed such that the first and second inlet valve at least one working cylinder together and / or the first and second exhaust valve at least one working cylinder together via a rocker arm bridge are actuated, said on the rocker arm bridge about a pivot axis pivotally a rocker is arranged such that the first camshaft with a respective cam at a first location spaced from the pivot axis acts on the rocker and the second cam shaft via a respective cam at a second location spaced from the pivot axis acts on the rocker, wherein the first and the second location are arranged on opposite sides of the rocker relative to the pivot axis.
Dies hat den Vorteil, dass sich die Einlass- und Auslassdauer der Gaswechselventile erhöht und NOx-Grenzwerte auch für hochdynamische Testzyklen (schnelle EGR) eingehalten werden, ohne dass hierfür kostspielige Abgasnachbehandlungsmaßnahmen, wie SCR, notwendig wären. This has the advantage that the inlet and outlet duration of the gas exchange valves increases and NOx limits are maintained even for highly dynamic test cycles (fast EGR) without the need for expensive exhaust aftertreatment measures such as SCR.
Zweckmäßigerweise ist die erste und/oder zweite Stelle als Rollenabgriff ausgebildet. In einer bevorzugten Ausführungsform ist die erste Stelle an der Wippe mit einem identischen oder einem unterschiedlichen Abstand von der Schwenkachse wie die zweite Stelle angeordnet. Conveniently, the first and / or second position is designed as Rollenabgriff. In a preferred embodiment, the first location on the rocker is located at an identical or different distance from the pivot axis as the second location.
Die Erfindung wird im Folgenden anhand der Zeichnung näher erläutert. Diese zeigt in The invention will be explained in more detail below with reference to the drawing. This shows in
Die in
An der Kipphebelbrücke
Die Nocken
In den
Durch die erfindungsgemäße Kopplung der Nockenhübe der Nocken
Gleiches gilt analog für die beiden Auslassventile
Zusätzlich ist aus
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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DE102007049110.9A DE102007049110B4 (en) | 2007-10-12 | 2007-10-12 | Internal combustion engine with two mixed camshafts |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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DE102007049110.9A DE102007049110B4 (en) | 2007-10-12 | 2007-10-12 | Internal combustion engine with two mixed camshafts |
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DE102007049110A1 DE102007049110A1 (en) | 2009-04-16 |
DE102007049110B4 true DE102007049110B4 (en) | 2017-06-22 |
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DE102007049110.9A Active DE102007049110B4 (en) | 2007-10-12 | 2007-10-12 | Internal combustion engine with two mixed camshafts |
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Families Citing this family (1)
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DE102013020923A1 (en) * | 2013-12-11 | 2015-06-11 | Daimler Ag | Piston engine and associated operating method |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3531000A1 (en) * | 1985-08-30 | 1986-08-28 | Herbert Dipl.-Ing. 8000 München Gohle | Device for reducing the throttle losses in piston engines under partial load by phase control of the valves |
US5052350A (en) * | 1990-11-02 | 1991-10-01 | King Brian T | Device to combine the motions of two camlobes differentially phased |
DE19600536A1 (en) * | 1996-01-09 | 1997-07-10 | Meta Motoren Energietech | Device for variable control of inlet valve of combustion engine |
DE10147305A1 (en) * | 2001-09-26 | 2003-04-17 | Bosch Gmbh Robert | Internal combustion engine |
DE10303601A1 (en) * | 2003-01-30 | 2004-08-12 | Mahle Ventiltrieb Gmbh | valve control |
EP1417399B1 (en) * | 2001-08-18 | 2005-04-27 | Mechadyne PLC | Adjustable valve control system with twin cams and a cam lift summation lever |
-
2007
- 2007-10-12 DE DE102007049110.9A patent/DE102007049110B4/en active Active
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3531000A1 (en) * | 1985-08-30 | 1986-08-28 | Herbert Dipl.-Ing. 8000 München Gohle | Device for reducing the throttle losses in piston engines under partial load by phase control of the valves |
US5052350A (en) * | 1990-11-02 | 1991-10-01 | King Brian T | Device to combine the motions of two camlobes differentially phased |
DE19600536A1 (en) * | 1996-01-09 | 1997-07-10 | Meta Motoren Energietech | Device for variable control of inlet valve of combustion engine |
EP1417399B1 (en) * | 2001-08-18 | 2005-04-27 | Mechadyne PLC | Adjustable valve control system with twin cams and a cam lift summation lever |
DE10147305A1 (en) * | 2001-09-26 | 2003-04-17 | Bosch Gmbh Robert | Internal combustion engine |
DE10303601A1 (en) * | 2003-01-30 | 2004-08-12 | Mahle Ventiltrieb Gmbh | valve control |
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